Excel how to add hour to datetime Posted on February 13, 2017September 14, 2018 by tekweirdo in Excel, Uncategorized Formula to add time to a date A1+TIME(1,0,0) Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related Published by tekweirdo View all posts by tekweirdo